[PATCH] ppc32: Added PCI support MPC83xx

Adds support for the two PCI busses on MPC83xx and the MPC834x SYS/PIBS
reference board.

The code initializes PCI inbound/outbound windows, allocates and registers
PCI memory/io space.  Be aware that setup of the PCI buses on the PIBs
board is expected to be done by the firmware.

Signed-off-by: Tony Li <tony.li@freescale.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 249 insertions, 1 deletions

diff --git a/arch/ppc/syslib/ppc83xx_setup.c b/arch/ppc/syslib/ppc83xx_setup.c
index 602a86891f7f..890484e576e7 100644
--- a/arch/ppc/syslib/ppc83xx_setup.c
+++ b/arch/ppc/syslib/ppc83xx_setup.c
@@ -11,6 +11,17 @@
  * under  the terms of  the GNU General  Public License as published by the
  * Free Software Foundation;  either version 2 of the  License, or (at your
  * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the  GNU General Public License along
+ * with this program; if not, write  to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Added PCI support -- Tony Li <tony.li@freescale.com>
  */
 
 #include <linux/config.h>
@@ -31,6 +42,10 @@
 #include <asm/delay.h>
 
 #include <syslib/ppc83xx_setup.h>
+#if defined(CONFIG_PCI)
+#include <asm/delay.h>
+#include <syslib/ppc83xx_pci.h>
+#endif
 
 phys_addr_t immrbar;
 
@@ -162,4 +177,237 @@ mpc83xx_halt(void)
         for(;;);
 }
 
-/* PCI SUPPORT DOES NOT EXIT, MODEL after ppc85xx_setup.c */
+#if defined(CONFIG_PCI)
+void __init
+mpc83xx_setup_pci1(struct pci_controller *hose)
+{
+        u16 reg16;
+        volatile immr_pcictrl_t * pci_ctrl;
+        volatile immr_ios_t * ios;
+        bd_t *binfo = (bd_t *) __res;
+
+        pci_ctrl = ioremap(binfo->bi_immr_base + 0x8500, sizeof(immr_pcictrl_t));
+        ios = ioremap(binfo->bi_immr_base + 0x8400, sizeof(immr_ios_t));
+
+        /*
+         * Configure PCI Outbound Translation Windows
+         */
+        ios->potar0 = (MPC83xx_PCI1_LOWER_MEM >> 12) & POTAR_TA_MASK;
+        ios->pobar0 = (MPC83xx_PCI1_LOWER_MEM >> 12) & POBAR_BA_MASK;
+        ios->pocmr0 = POCMR_EN |
+                (((0xffffffff - (MPC83xx_PCI1_UPPER_MEM -
+                                MPC83xx_PCI1_LOWER_MEM)) >> 12) & POCMR_CM_MASK);
+
+        /* mapped to PCI1 IO space */
+        ios->potar1 = (MPC83xx_PCI1_LOWER_IO >> 12) & POTAR_TA_MASK;
+        ios->pobar1 = (MPC83xx_PCI1_IO_BASE >> 12) & POBAR_BA_MASK;
+        ios->pocmr1 = POCMR_EN | POCMR_IO |
+                (((0xffffffff - (MPC83xx_PCI1_UPPER_IO -
+                                MPC83xx_PCI1_LOWER_IO)) >> 12) & POCMR_CM_MASK);
+
+        /*
+         * Configure PCI Inbound Translation Windows
+         */
+        pci_ctrl->pitar1 = 0x0;
+        pci_ctrl->pibar1 = 0x0;
+        pci_ctrl->piebar1 = 0x0;
+        pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | PIWAR_IWS_2G;
+
+        /*
+         * Release PCI RST signal
+         */
+        pci_ctrl->gcr = 0;
+        udelay(2000);
+        pci_ctrl->gcr = 1;
+        udelay(2000);
+
+        reg16 = 0xff;
+        early_read_config_word(hose, hose->first_busno, 0, PCI_COMMAND, &reg16);
+        reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+        early_write_config_word(hose, hose->first_busno, 0, PCI_COMMAND, reg16);
+
+        /*
+         * Clear non-reserved bits in status register.
+         */
+        early_write_config_word(hose, hose->first_busno, 0, PCI_STATUS, 0xffff);
+        early_write_config_byte(hose, hose->first_busno, 0, PCI_LATENCY_TIMER, 0x80);
+
+        iounmap(pci_ctrl);
+        iounmap(ios);
+}
+
+void __init
+mpc83xx_setup_pci2(struct pci_controller *hose)
+{
+        u16 reg16;
+        volatile immr_pcictrl_t * pci_ctrl;
+        volatile immr_ios_t * ios;
+        bd_t *binfo = (bd_t *) __res;
+
+        pci_ctrl = ioremap(binfo->bi_immr_base + 0x8600, sizeof(immr_pcictrl_t));
+        ios = ioremap(binfo->bi_immr_base + 0x8400, sizeof(immr_ios_t));
+
+        /*
+         * Configure PCI Outbound Translation Windows
+         */
+        ios->potar3 = (MPC83xx_PCI2_LOWER_MEM >> 12) & POTAR_TA_MASK;
+        ios->pobar3 = (MPC83xx_PCI2_LOWER_MEM >> 12) & POBAR_BA_MASK;
+        ios->pocmr3 = POCMR_EN | POCMR_DST |
+                (((0xffffffff - (MPC83xx_PCI2_UPPER_MEM -
+                                MPC83xx_PCI2_LOWER_MEM)) >> 12) & POCMR_CM_MASK);
+
+        /* mapped to PCI2 IO space */
+        ios->potar4 = (MPC83xx_PCI2_LOWER_IO >> 12) & POTAR_TA_MASK;
+        ios->pobar4 = (MPC83xx_PCI2_IO_BASE >> 12) & POBAR_BA_MASK;
+        ios->pocmr4 = POCMR_EN | POCMR_DST | POCMR_IO |
+                (((0xffffffff - (MPC83xx_PCI2_UPPER_IO -
+                                MPC83xx_PCI2_LOWER_IO)) >> 12) & POCMR_CM_MASK);
+
+        /*
+         * Configure PCI Inbound Translation Windows
+         */
+        pci_ctrl->pitar1 = 0x0;
+        pci_ctrl->pibar1 = 0x0;
+        pci_ctrl->piebar1 = 0x0;
+        pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | PIWAR_IWS_2G;
+
+        /*
+         * Release PCI RST signal
+         */
+        pci_ctrl->gcr = 0;
+        udelay(2000);
+        pci_ctrl->gcr = 1;
+        udelay(2000);
+
+        reg16 = 0xff;
+        early_read_config_word(hose, hose->first_busno, 0, PCI_COMMAND, &reg16);
+        reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+        early_write_config_word(hose, hose->first_busno, 0, PCI_COMMAND, reg16);
+
+        /*
+         * Clear non-reserved bits in status register.
+         */
+        early_write_config_word(hose, hose->first_busno, 0, PCI_STATUS, 0xffff);
+        early_write_config_byte(hose, hose->first_busno, 0, PCI_LATENCY_TIMER, 0x80);
+
+        iounmap(pci_ctrl);
+        iounmap(ios);
+}
+
+/*
+ * PCI buses can be enabled only if SYS board combinates with PIB
+ * (Platform IO Board) board which provide 3 PCI slots. There is 2 PCI buses
+ * and 3 PCI slots, so people must configure the routes between them before
+ * enable PCI bus. This routes are under the control of PCA9555PW device which
+ * can be accessed via I2C bus 2 and are configured by firmware. Refer to
+ * Freescale to get more information about firmware configuration.
+ */
+
+extern int mpc83xx_exclude_device(u_char bus, u_char devfn);
+extern int mpc83xx_map_irq(struct pci_dev *dev, unsigned char idsel,
+                unsigned char pin);
+void __init
+mpc83xx_setup_hose(void)
+{
+        u32 val32;
+        volatile immr_clk_t * clk;
+        struct pci_controller * hose1;
+#ifdef CONFIG_MPC83xx_PCI2
+        struct pci_controller * hose2;
+#endif
+        bd_t * binfo = (bd_t *)__res;
+
+        clk = ioremap(binfo->bi_immr_base + 0xA00,
+                        sizeof(immr_clk_t));
+
+        /*
+         * Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
+         */
+        val32 = clk->occr;
+        udelay(2000);
+        clk->occr = 0xff000000;
+        udelay(2000);
+
+        iounmap(clk);
+
+        hose1 = pcibios_alloc_controller();
+        if(!hose1)
+                return;
+
+        ppc_md.pci_swizzle = common_swizzle;
+        ppc_md.pci_map_irq = mpc83xx_map_irq;
+
+        hose1->bus_offset = 0;
+        hose1->first_busno = 0;
+        hose1->last_busno = 0xff;
+
+        setup_indirect_pci(hose1, binfo->bi_immr_base + PCI1_CFG_ADDR_OFFSET,
+                        binfo->bi_immr_base + PCI1_CFG_DATA_OFFSET);
+        hose1->set_cfg_type = 1;
+
+        mpc83xx_setup_pci1(hose1);
+
+        hose1->pci_mem_offset = MPC83xx_PCI1_MEM_OFFSET;
+        hose1->mem_space.start = MPC83xx_PCI1_LOWER_MEM;
+        hose1->mem_space.end = MPC83xx_PCI1_UPPER_MEM;
+
+        hose1->io_base_phys = MPC83xx_PCI1_IO_BASE;
+        hose1->io_space.start = MPC83xx_PCI1_LOWER_IO;
+        hose1->io_space.end = MPC83xx_PCI1_UPPER_IO;
+#ifdef CONFIG_MPC83xx_PCI2
+        isa_io_base = (unsigned long)ioremap(MPC83xx_PCI1_IO_BASE,
+                        MPC83xx_PCI1_IO_SIZE + MPC83xx_PCI2_IO_SIZE);
+#else
+        isa_io_base = (unsigned long)ioremap(MPC83xx_PCI1_IO_BASE,
+                        MPC83xx_PCI1_IO_SIZE);
+#endif /* CONFIG_MPC83xx_PCI2 */
+        hose1->io_base_virt = (void *)isa_io_base;
+        /* setup resources */
+        pci_init_resource(&hose1->io_resource,
+                        MPC83xx_PCI1_LOWER_IO,
+                        MPC83xx_PCI1_UPPER_IO,
+                        IORESOURCE_IO, "PCI host bridge 1");
+        pci_init_resource(&hose1->mem_resources[0],
+                        MPC83xx_PCI1_LOWER_MEM,
+                        MPC83xx_PCI1_UPPER_MEM,
+                        IORESOURCE_MEM, "PCI host bridge 1");
+
+        ppc_md.pci_exclude_device = mpc83xx_exclude_device;
+        hose1->last_busno = pciauto_bus_scan(hose1, hose1->first_busno);
+
+#ifdef CONFIG_MPC83xx_PCI2
+        hose2 = pcibios_alloc_controller();
+        if(!hose2)
+                return;
+
+        hose2->bus_offset = hose1->last_busno + 1;
+        hose2->first_busno = hose1->last_busno + 1;
+        hose2->last_busno = 0xff;
+        setup_indirect_pci(hose2, binfo->bi_immr_base + PCI2_CFG_ADDR_OFFSET,
+                        binfo->bi_immr_base + PCI2_CFG_DATA_OFFSET);
+        hose2->set_cfg_type = 1;
+
+        mpc83xx_setup_pci2(hose2);
+
+        hose2->pci_mem_offset = MPC83xx_PCI2_MEM_OFFSET;
+        hose2->mem_space.start = MPC83xx_PCI2_LOWER_MEM;
+        hose2->mem_space.end = MPC83xx_PCI2_UPPER_MEM;
+
+        hose2->io_base_phys = MPC83xx_PCI2_IO_BASE;
+        hose2->io_space.start = MPC83xx_PCI2_LOWER_IO;
+        hose2->io_space.end = MPC83xx_PCI2_UPPER_IO;
+        hose2->io_base_virt = (void *)(isa_io_base + MPC83xx_PCI1_IO_SIZE);
+        /* setup resources */
+        pci_init_resource(&hose2->io_resource,
+                        MPC83xx_PCI2_LOWER_IO,
+                        MPC83xx_PCI2_UPPER_IO,
+                        IORESOURCE_IO, "PCI host bridge 2");
+        pci_init_resource(&hose2->mem_resources[0],
+                        MPC83xx_PCI2_LOWER_MEM,
+                        MPC83xx_PCI2_UPPER_MEM,
+                        IORESOURCE_MEM, "PCI host bridge 2");
+
+        hose2->last_busno = pciauto_bus_scan(hose2, hose2->first_busno);
+#endif /* CONFIG_MPC83xx_PCI2 */
+}
+#endif /*CONFIG_PCI*/